OP just for grins, try Jim Otar's Calculator. Otar uses "aft casting" and not MC. I plugged in $1MM 100% equity portfolio with $40K (which clearly is not a constant 4%) withdrawal for 50 years. The results may surprise you...or not. 100% equity portfolio had a 21% probability of depletion ...

Perhaps most folks got it working again. I got it working by deleting the Vanguard passwords, restarting Quicken and re-typing the passwords. Hope you get it sorted out. It was indeed frustrating for about a week.